VisPy colormaps

This notebook illustrates the colormap API provided by VisPy.

List all colormaps



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import numpy as np
from vispy.color import (get_colormap, get_colormaps, Colormap)
from IPython.display import display_html



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for cmap in get_colormaps():
    display_html('<h3>%s</h3>' % cmap, raw=True)
    display_html(get_colormap(cmap))

Discrete colormaps

Discrete colormaps can be created by giving a list of colors, and an optional list of control points (in $[0,1]$, the first and last points need to be $0$ and $1$ respectively). The colors can be specified in many ways (1-character shortcuts, hexadecimal values, arrays or RGB values, ColorArray instances, and so on).



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Colormap(['r', 'g', 'b'], interpolation='zero')



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Colormap(['r', 'g', 'y'], interpolation='zero')



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Colormap(np.array([[0, .75, 0],
                   [.75, .25, .5]]), 
         [0., .25, 1.], 
         interpolation='zero')



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Colormap(['r', 'g', '#123456'],
         interpolation='zero')

Linear gradients



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Colormap(['r', 'g', '#123456'])



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Colormap([[1,0,0], [1,1,1], [1,0,1]], 
               [0., .75, 1.])